Portable electrically-driven machine for planing, grinding, drilling, milling, sawing, and other operations



Sept. 10, 1929. a slMONlDEs 1,727,383

PORTABLE ELECTRIGALLY DRIVEN MACHINE FOR PLANING, GRINDING, DRILLING,MILLING, SAWING, AND OTHER OPERATIONS Filed Sept. 7, 1926 [n z/eniorPatented Sept. 10, 1929.

UNITED STATES BRUNO SIMONIDES, OI MANNHEIM, GERMANY.

PORTABLE ELECTBICALLY-DRIVEN MACHINE FOB PLANING, GRINDING, DRILLING,

. MILLING, SAWING, AND OTHER OPERATIONS.

Application filed September 7, 1926, Serial No.

This invention relates to a portable, driven machine for planing,grinding, drilling, milling, sawing and other operations, in which atool carrier is driven by means of an electric motor supported by thebodyor stock of the machine. The objects of the invention are, first, toreduce the size and the weight of the machine; second, to lower thecenter of gravity of the machine; and third, to provide means for theproperhandling of the machine in planing straight as well as curvedsurfaces, or 1n using the machine for milling, drilling, grinding,polishing and other like Work.

The invention is illustrated in the accompanying drawing, in which Fig.1 is a side elevation of one form of the hand planer with parts brokenaway from which the electric motor is removed; Fig. 2 is a horizontalsection of the hand planer casing on the line II showing the face platesonly, Fig. 1; Fig. 3 is a vertical section of the hand planer with themotor in place on the line IIII, Fig. 1; Fig. 4 is atransverse sectionof a part of the hand planer on the line IIIIII, Fig. 1; Fig. 5 is anelevation, with parts shown in vertical section, of a modified form ofthe hand planer; Fig. 6 is a horizontal section of the hand planer onthe line IV-IV, Fig. 5; Fig. 7 is a vertical section on the line VV,Fig. 6; and Fig. 8 is a detailed sectional plan view through a part ofthe casing on a larger scale.

A base plate 1 supports a housing 2 constituting a planer body and anenclosure for an electric motor. The outer end of the plate 1 isprovided with a supporting standard 3 formed at its upper end with asupport 4. To the housing 2 are secured a forward handle 5 and arearward handle 6. The end of the rearward handle 6 engages in a socketor recess 7 in the support 4 and is secured to the latter by means of anadjusting screw 8. The plate 1 is provided with beveled ribs 9 and thehousing 2 is provided with beveled faces secured to the sloping surfaceof these ribs 9 by means of nuts 10, while the forward part of thehousing 2 is provided with a wedgeshaped member 11, slidably mounted ininclined ooves 12 of the housing 2. The wedge-s aped member 11 isprovided with 134,030, and in Germany September 15, 1925.

screw-threaded bolt holes 13 to receive threaded adjusting pins 14passing through sockets 1o secured to the casing 2. The adusting pins 14are provided with shoulders 16 and their outer ends are secured to disknuts 17. By means of these shoulders and nuts the pins 14 are held fromsliding within the sockets 15. By manipulating the disk nuts 17 the pins14 may be rotated and the wedge-shaped member 11 may be adjusted to-.ward and from the plate 1 and higher or lower than the latter.

The housing 2 is cup-shaped to form a circular chamber 18 receiving andpartially enclosing the armature 19 and field 19 of an electric motor,and the housing also encloses a cutter head or cylinder 20 attached tothe armature shaft 21. The housing 2 is open at the bottom to form acutter exposing slot 22 through which cutters on the periphery of thehead or cylinder 20 project for planing a surface lying beneath the slotin the rotation of said head. In this operation, the handles 5 and 6enable the operator to hold and guide the device and to bring its slot22 into the desired position upon the work to be planed.

The plate 1 is provided with a lateral enlargement 23 projecting at oneside of the opening 22 to form a guide and to stably support and preventtilting of the planer under the weight of the adjacent overhanging partof the motor extending laterally beyond that side of the housing 2. Thecutter head 20 is cup-shaped to comprise a fly-wheel overlapping thefield casing 28 of the motor. The periphery of the head 20-is providedwith a plurality of longitudinally directed and tangentially extendingrecesses 24. For the purpose of illustration three recesses are shownuniformly spaced in Fig. 1. These recesses are shaped to receive cuttersor knives 25 which are secured in position to the head by means ofscrews or the like in such a manner, that the cutting edges of theknives 25 as the cutter part is rotated successively project through theopening 22 to operate on the work.

Instead of the cutter head 20, other means,

or example a on -shaped emery-wheel having a covering 0 cork or rubberor leather dressed with grinding or polishing subthreaded at 29 into asleeve 30' which forms an integral part of the cup shaped head 20. Thissleeve 30 is journaled into the bearing 29 and extends through it.. Thebearings 26 and 29 are preferably provided with antifriction balls orrollers 30 to reduce the friction. Into this extended portion of thesleeve 30, the shaft 32 of a milling wheel 32 is threaded. Instead ofthis milling wheel other tools, for example an emery-wheel or a bearingor grinding or polishing wheel may be secured to the shaft 21. In thesecases, the knives 25 are removed from the head 20 for enabling the-latter to act solely as a fly-wheel.

The cup-shaped head 20 is provided with a central chamber 33 extendingfrom an inner wall 34 to form a cylindrical hood open at one end fortelescopically overlapping one end of the electric motor within thechamber 18 of the cup-shaped housing. This end of the electric motorprojects into the chamber 33 of the housing so as to be received by theinner end of the head 20 which rotates about the inner end part of thecasing 28. This end part of the casing 28 thus forms a bearing to guidethe head 20 during its rotation. The wall 34 is provided with recessesto form inlets 35 for ventilating air currents to pass into the chamber33 for the purpose of cooling the electric motor and the cutter head.The cylindrical part of the head 20 is provided with holes 36 axiallydirected and adapted to receive a pin 37 passing through a lug 38 of thecasing 2. This pin 37 will be employed when the head 20 is to be lockedwhen it is desired to adjust or to remove the knives from-the head or tomake repairs.

In the form ofthe hand planer shown in Fig. 5, there is adjustablyattached to the side walls of the casing 2 a resilient base plate 39having a central slot 40 arranged beneath and symmetrical to the-opening22 of the housing. The base plate 39 extends beneath the housing 2 andis provided at the ends of the slot 40 with enlargements 41 and 42. Theenlargement 41 forms an upwardly bent shoulder adapted to slide upon themargin of the nonplaned surface part of a work piece. At the sides ofand near the slot 40 of the plate 39 are fixed lateral webs 43' eachhaving therein an elongated slot 44. Screws 45 passing through the slots44 engage in screw threaded holes arranged in the side walls of thehousing 2. By this arrangement the plate 39 is adjustably connected tothe housing 2.

In the walls of the casing 2 are mounted slides 56 sloping towards thetop of the baseplate 39 for supporting the latter at the forward andrearward sides of the slot 40, to prevent said blade from coming incontact with the cutter head and to limit the distance between saidadjustable sole blades and said cutter head. The slides 56 areapproximately concentrically curved with respect to the periphery of thehead 20. Each slide 56 is adjustable by means of an adjusting screw bolt57 engaging in a nut disk 58 rotatably and non-slidably mounted in thewall of the housing 2. Each slide 56 is preferably connected by means ofa hinge 59 with the screw bolt 57 to allow the movement of the slides 56in radial and tangential directions relatively to the head 20. Stops 60are provided on the slides for engagement with guides to limit thedownward movement of the slides and prevent the same from coming incontact with the knives of the head 20.

Having thus described the invention what is claimed as new is:

1. In a portable electrically driven and hand guided machine forplaning, grinding, drilling, milling, sawing and other operations, ahousing having an opening in one side thereof and a cutter exposing slotin its bottom, a casing detachably secured to said side of the housingand extending partially into the housing through said opening, anelectric motor partially enclosed by said casing and projecting at itsinner end beyond the casing into the housing, one end of the motor shaftbeing journaled in the casing and the other end of the shaft beingjournaled in the side of the housing opposite that to which the motor issecured, a rotary cupshaped cylinder in the housing receiving theinwardly projecting end of the casing and having a wall at one side andopen at its opposite side, said wall of the cylinder being fixed to themotor shaft and said open side of the cylinder embracing and rotatingabout the periphery of the motor casing, and cutters on said cylinderadapted to project in the rotation of the cylinder through the saidcutter exposing slot.

2. In a portable electrically driven and hand guided machine forplaning, grinding, drilling, milling, sawing and other opera-' tions, ahousing having an opening in one side thereof and a cutter exposing slotin its bottom, a casing detachably secured to said side of the housingand extending partial] into the housing through said opening, an eectric motor partially enclosed by said casing and tor is secure arotary cu -shaped cylinder in the housing receivlng t e inwardlyprojecting end of the casing and having a wall at one side and open atits opposite side, said wall of the cylinder being fixed to the motorshaft and said open side of the cylinder embracing and rotating aboutthe periphery of the motor casing, the said side wall of the housing andthe said wall of the cylinder being provided with axially arranged airpassages, and cutters on said cylinder adapted to project in therotation of the cylinder throu h the said cutter exposing slot.

3. I n a portable electrically driven and hand guided machine forplaning, grinding, drilling, millin sawing and other operations, ahousing having an opening in one side thereof and a cutter exposing slotin its bottom, a casing detachably secured to said side of the housingand extending partially into the housing through said 0 ning, anelectric motor partially enclose by said casing and projecting at itsinner end beyond the casing into the housing, one end of the motor shaftbeing journaled in the casing and the other end of the shaft beingjournaled in the side of the housing opposite that to which the motor issecured, a rotary cup-shaped cylinder in the housing receiving theinwardly prtijecting end of the casin and havin a we at one side andopen at its 0 posite side said wall of the c linder being xed to themotor shaft and said open side of the cylinder embracing and rotatingabout the riphery of the motor casing, cutters on said cy inder adaptedto project in the rotation of the cylinder through the said cutterexposing slot, and a bracing and guiding projection at one side of thebase of the housing and extending laterally beyond the same to bear uponthe work and prevent tilting of the casing in that direction andregulate the depth of cut.

4. In a rtable electrically driven and hand guid machine for planing,grinding, drilling, milling, sawing and other operations, thecombination of a planer housing having resilient guiding sole-blades andbetween the latter an openin for the projection of planing-tools, curedto one lateral face of said housing and projecting plartly into the samea cup-shaped cutter'attac ed to the shaft of t e said motor, adjusingscrews operating through the walls of the said housing, and slidesoperable by an e ectric motor, se-

means of said adjusting screws to control the width of the said opening.

In testimony whereof I have aflixed hereunto my signature.

BRUNO SIMONIDE S.

